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The Heusler compound ScInAu$_2$ was previously reported to have a superconducting ground state with a critical temperature of 3.0 K. Recent high throughput calculations have also predicted that the material harbors a topologically…

Superconductivity · Physics 2021-08-25 J. M. DeStefano , G. P. Marciaga , J. B. Flahavan , U. S. Shah , T. A. Elmslie , M. W. Meisel , J. J. Hamlin

We report superconductivity in Sn$_{x}$NbSe$_{2-\delta}$, a topological nodal-line semimetal candidate with a noncentrosymmetric crystal structure. The superconducting transition temperature $T_{c}$ of this compound is extremely sensitive…

We have synthesized polycrystalline samples of the noncentrosymmetric superconductor Mo3Al2C by arc and RF melting, measured its transport, magnetic and thermodynamic properties, and computed its band structure. Experimental results…

We report semiconductor to metal-like crossover in temperature dependence of resistivity ($\rho$) due to the switching of charge transport from bulk to surface channel in three-dimensional topological insulator…

Materials Science · Physics 2017-07-10 Prithwish Dutta , Arnab Pariari , Prabhat Mandal

The thermal conductivity $\kappa (H,T)$ of the new superconductor $MgB_2$ was studied as a function of the temperature and a magnetic field. No anomaly in the thermal conductivity $\kappa (H,T)$ is observed around the superconducting…

Superconductivity · Physics 2015-06-24 Bai-Mei Wu , Dong-Sheng Yang , Wei-Hua Zeng , Shi-Yan Li , Bo Li , Rong Fan , Xian-Hui Chen , Lie-Zhao Cao , Marcel Ausloos

Quasi one dimensional materials provide a compelling platform where reduced dimensionality stabilizes intertwined topological and superconducting phases. Here we report superconductivity in a new Bi based quasi 1D compound, PtPb3Bi, which…

Topological superconductors (TSCs) are of significant current interest because they offer promising platforms for finding Majorana fermions. Here we report a new superconductor synthesized by intercalating Cu into a naturally-formed…

Superconductivity · Physics 2015-06-19 Satoshi Sasaki , Kouji Segawa , Yoichi Ando

The Debye temperature, T${_\theta}$=(h/2${\pi}$)/k${_B}$$\omega$$_\theta$, where the Debye frequency $\omega$$_\theta$ is integrated characteristic frequency of full phonon spectrum, $\alpha$$^2$($\omega$)F($\omega$). In the BCS theory,…

Superconductivity · Physics 2020-08-04 E. F. Talantsev

Superconducting properties were studied on high quality superconductors $Ba_{x}(NH_{3})Fe_{2}Se_{2}$ ($T_{c}$ = 39 K) and $Sr_{x}(NH_{3})Fe_{2}Se_{2}$ ($T_{c}$ = 44 K) prepared by intercalating Ba/Sr atoms into tetragonal $\beta$-FeSe by…

Superconductivity · Physics 2016-02-17 Yung-Yuan Hsu , Yu-Bo Li , Shou-Ting Jian , Gu-Kuei Li , Ming-Cheng Yang

We observed quantum oscillations in thermoelectric and magnetic torque signals in non-centrosymmetric superconductor PbTaSe$_2$. One oscillatory frequency stems from the orbits formed by magnetic breakdown, while others are from…

Superconductivity · Physics 2019-03-28 Xitong Xu , Zhibo Kang , Tay-Rong Chang , Hsin Lin , Guang Bian , Zhujun Yuan , Zhe Qu , Jinglei Zhang , Shuang Jia

We report the synthesis and physical properties of the single crystals of TaC, which are proposed to hold topological band structure as a topological superconductor (TSC) candidate. Magnetization, resistivity and specific heat measurements…

Superconductivity · Physics 2021-02-04 D. Yu. Yan , M. Yang , C. X. Wang , P. B. Song , C. J. Yi , Y. G. Shi

In a recent publication by Li $\textit{et al.}$, two phases of beryllene - $\alpha$ and $\beta$ - were predicted to be single-gap superconductors with critical temperatures of 9.9 K and 12.6 K respectively. Moreover, the $\alpha$-beryllene…

Superconductivity · Physics 2024-07-29 Mikhail Petrov , Milorad V. Milosevic

This work reports on the novel Heusler superconductor ZrNi2Ga. Compared to other nickel-based superconductors with Heusler structure, ZrNi2Ga exhibits a relatively high superconducting transition temperature of Tc=2.9 K and an upper…

The crystal structure, superconducting properties, and electronic structure of a novel superconducting 122-type antimonide, BaPt$_2$Sb$_2$, have been investigated by measurements of powder X-ray diffraction patterns, electrical resistivity,…

Superconductivity has been first observed in TlNi$_2$Se$_2$ at T$_C$=3.7 K and appears to involve heavy electrons with an effective mass $m^*$=14$\sim$20 $m_b$, as inferred from the normal state electronic specific heat and the upper…

Superconductivity · Physics 2013-11-20 Hangdong Wang , Chiheng Dong , Qianhui Mao , Rajwali Khan , Xi Zhou , Zhenxia Li , Bin Chen , Jinhu Yang , Qiping Su , Minghu Fang

Alloying indium into the topological insulator Sn1-xInxBi2Te4 induces bulk superconductivity with critical temperatures Tc up to 1.85 K and upper critical fields up to about 14 kOe. This is confirmed by electrical resistivity, heat…

The specific heat C of a sintered polycrystalline sample of MgB2 with a bulk superconducting transition temperature Tc=36.7 K is measured as a function of the temperature (2-300 K) and magnetic field (0-16 T), together with magnetic…

Superconductivity · Physics 2009-11-07 Y. Wang , T. Plackowski , A. Junod

The search for nontrivial superconductivity in novel quantum materials is currently a most attractive topic in condensed matter physics and material science. The experimental studies have progressed quickly over the past couple of years. In…

We present different transport measurements up to fields of 29~T in the recently discovered heavy-fermion superconductor UTe$_{2}$ with magnetic field $H$ applied along the easy magnetization a-axis of the body-centered orthorhombic…

A new layered compound LaOTlF2 is designed and investigated using first-principles calculations in this work. The parent compound is an insulator with an indirect band gap of 2.65 eV. Electron-doping of the parent compound makes the…

Superconductivity · Physics 2022-04-06 Zhihong Yuan , Jingjing Meng , Rui Liu , Pengyu Zheng , Xiaobo Ma , Guangwei Wang , Tianye Yu , Yiran Peng , Zhiping Yin